Clamping device on fretboard



FIG. 1 is a front elevational view of the clamping device on fretboard showing my new design;

FIG. 2 is a left-side elevational view of the clamping device on fretboard thereof;

FIG. 3 is right side elevational view of the clamping device on fretboard thereof;

FIG. 4 is a top plan view of the clamping device on fretboard thereof;

FIG. 5 is a bottom plan view of the clamping device on fretboard thereof; and,

FIG. 6 is a perspective view of the clamping device on fretboard thereof. 

I claim, the ornamental design for the clamping device on fretboard, as shown and described. 